ManagedConnectionFactoryParserDeployer -> java.lang.LinkageError: JAXB 2.0 API is being loaded from the bootstrap classloader, but this RI (from vfszip:/C:/MY-WORKSHOP/JBoss 5.0/jboss-5.0.0.GA/lib/jaxb-impl.jar/com/sun/xml/bind/v2/model/impl/ModelBuilder.class) needs 2.1 API. Use the endorsed directory mechanism to place jaxb-api.jar in the bootstrap classloader. (See http://java.sun.com/j2se/1.5.0/docs/guide/standards/)